What is a Machine - Section Review
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1.  Explain how using a ramp makes work easier. *
2 points
2. Why can't a machine be 100 percent efficient? *
2 points
3.  Suppose you exert 15 N on a machine, and the machine exerts 300 N on another object.  What is the machine's mechanical advantage? *
1 point
4.  For the machine described in question 3, how does the distance through which the output force is exerted differ from the distance through which the input force is exerted? *
2 points
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